Paper spool or bobbin



(N0 Modl.)

G. E. GRIMM.

PAPER SPOOL 0R BOBBIN. No. 513,318, Patented Jan. 23, 1894.

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UNITED STATES PATENT OFFICE.

GERHARDT E. GRIMM, OF CAMDEN, NEV JERSEY.

PAPER SPOOL OR BOBBIN.

SPECIFICATION forming part of Letters Patent No. 513,318, dated January 23, 1894.

Application filed May 16, 1893. Serial No. 474,485. (No model.)

To all whom it may concern.-

Be it known that I, GERHARDT E. GRIMM, a citizen of the United States, residing at Camden, in the county of Camden and State of New Jersey, have invented a new and useful Improvement in Paper-Spools or Bobbins, of

v which the following is a specification.

My invention relates to an improvement in paper spools, or bobbins, upon which a continuous thread of yarn, either cotton or woolen, strands of silk, webbing-s of braid, or tapes, for use in weaving or other arts and manufactures, are destined to be wound.

My spool or bobbin consists of a sheet of paper out to the proper dimensions requisite to be rolled into cylindrical tubular shape, and having the layers thereof forming the body, united by adhesive cement, to obtain the necessary rigidity and firmness, while at the same time securing lightness of weight, with limited cost. Each end of this cylindrical tube, is provided with a short tubular section of like material and construction, that is placed within the former tube, at each end, and cemented therein, materially aiding in strengthening and stiffening said main cylindrical tube. Within this short section is placed a short metallic tube, whose outer circumference is equal to the inner circumference of said short section, embracing it closely. This metallic tube is flanged upon both ends, that project vertically upward, and serve to protect and assist in maintaining the end vertical disks in position upon the ends of the horizontal cylindrical tube forming the body of the spool, or bobbin. Within each of these metallic tubes is located a compressed paper bushing, formed into shape in a pair of dies under pressure, and provided with a central bore extending horizontally through them. The object of these end bushings together with one placed in the center of the spool. Fig. 2, is'a cross section of the bobbin, taken through the dotted line 00, 0c, of Fig. 1, viewed in the-direction of the arrow R. Fig. 3, is an end view of the bobbin. Fig. 4, is a vertical sectional view of one of the end disks B, short sectional end tube 0, and metallic flanged tube D, with the bushing E, arranged in its interior, ready for cementing to the cylindrical tubular portion A, of the bobbin. Fig. 5, is a face view of the inner end of the metallic flanged tube D, that connects the short cylindrical section 0, with the end disk B, and the bushing E. Fig. 6, isa side View of same. Fig. 7, is a face View of the outer end of the flanged tube D. Fig. 8, is a side view of one of the sectional end tubes 0.

Like letters of reference in all the figures indicate the same parts.

A, is the cylindrical tubular piece, forming the barrel portion of the bobbin, for the re ception of the strands of thread, yarn, tape, &c., destined to be wound thereon, for use in weaving purposes, which is constructed of a sheet of paper, rolled on a mandrel, and whose folds where overlapping each other, are united by an adhesive cement, to form a rigid cylinder capable of withstanding external pressure.

B, are the circular end disks, one at each end, of the bobbin, having an orifice in the center of each, that permits of their passage over the ends of the tube 0, and being firmly cemented thereon.

D, is a pair of metallic tubes, having flanges a, a, on their ends, which act as a medium for the connection of the disks B, and sections 0, ready for the insertion of the bushing E, previous to the connection of the parts with the cylindrical tube A.

The mode of construction is as follows: A sheet of paper, of the requisite length and width is formed, and coated upon one side with a liquid solution of adhesive cement. This sheet is then rolled upon a mandrehof sufficient size in diameter, to form the cylindrical tube A, and as the coated surface adheres in rolling together, a tube of great stiffness is formed, capable of sustaining severe pressure and Weight, and serving as a basis upon which to wind a continuous strand of thread, tape, braid, or webbing. The end disks B, are formed of thick paper, or sheets of paper cemented together, and molded into shape; each having a central orifice out sufficiently large for the reception of the short end sectional tube 0, the metallic flanged tube D, and the bushing E, which are connected together in the order named, previous to insertion within the ends of the cylindrical tube A, and then united therein withcement. The bushings E, are formed of paper, which while in a plastic state, are compressed into great solidity between a pair of dies formed for the purpose, with a central orifice b, in each which act as journal bearings for the bobbin, when placed on a spindle of a loom. Abushingb, placed central longitudinally in the inner area of the cylinder A, serves to aid in strengthening the latter, and also acts as a guide in passing the bobbin over a spindle.

Themain objects of the metallic flanged. tube D, are to give rigidity to the ends of the bob bin; and also the flanged external surface acts as a brace upon the adjacent surface of the disks B, enabling them to withstand the pressure of the material wound upon the surface of the cylinder A, and also the combined action of the metallic tubes D. The end tubes O, disks B, and bushings E, when united and cemented within the cylinder A, form a bobbin of superior strength, rigidity and lightness in weight, capable of withstanding great strain, and abuse, besides reducing the cost of transportation.

I claim as myinvention and desire to secure by Letters Patent- The paper spool or bobbin herein shown con- 

